Cisco Firewall :: ASA 5510 Deny TCP (no Connection)

May 17, 2012

My firewalls are running in multiple context mode.According to my troubleshooting, the problem happens because of the following things:
 
1- The host 10.15.5.100 do a telnet to 10.0.6.100 using the default gateway that is the context firewall C2;

2- The packet go to the C2 and is forward through the interface e0/0 (direct connected);

3- The packet is delivered direct to the host,without passthrough the context firewall C1;

4- The host receive the packet and return the answer to the source host 10.15.5.10 using the default gateway 10.0.1.10;

5- The packet is received by the context firewall C1 and is dropped with the reason Deny TCP (no connection) syn ack;
 
I think the the problem is on step 4, the context C1 receive a packet that didn't pass by it before. Am I right?

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Cisco Firewall :: 5510 - Deny IP Due To Land Attack

Mar 27, 2011

We are getting continuously log created as below in ASA 5510. I suspect something is going wrong (like system is getting compromised ? )
 
Note: I have changed the actually public IP to 1.1.1.1 for some security cause.
 
Log..
 
Mar 18 21:46:19 124.153.100.44 Mar 18 2011 21:46:22: %ASA-2-106017: Deny IP due to Land Attack from 1.1.1.1 to 1.1.1.1Mar 18 21:46:19 124.153.100.44 Mar 18 2011 21:46:23: %ASA-2-106017: Deny IP due to Land Attack from 1.1.1.1 to 1.1.1.1Mar 18 21:46:20 124.153.100.44 Mar 18 2011 21:46:23: %ASA-2-106017: Deny IP due to Land Attack from 1.1.1.1 to 1.1.1.1Mar 18 21:46:21 124.153.100.44 Mar 18 2011 21:46:24: %ASA-2-106017: Deny IP due to Land Attack from 1.1.1.1 to 1.1.1.1(code)

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Cisco Firewall :: Network Is Super Slow After Deny Tcp Log In ASA 5510

Jun 28, 2011

I used the ASA 5510 and in these days, facing the problem is internet is very slow. When i check in real-time log viewer debugging, i found the following logs 6|Jun 29 2011|15:47:53|106015|123.123.123.123|416|111.222.111.222|80|Deny TCP (no connection) from 123.123.123.123/416 to 111.222.111.222/80 flags ACK  on interface Inside 4|Jun 29 2011|15:47:53|106023|123.123.123.123|852|111.222.111.222|80|Deny tcp src Inside:123.123.123.123/852 dst Outside: 111.222.111.222/80 by access-group "Internal_access_in" [0x0, 0x0] a lot of log message are come out and I notice that 111.222.111.222 ip is try to attack my network. In that moment, my network is very slow and nearly to be down.  When I block with that ip by access list, network is up again. But after a few moment, attack from other ip, it's so terrible and so tired to block a lot of ip by acl.

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Cisco VPN :: Selected Shell Profile Is Showing Deny Access 5510

May 17, 2012

i have got the below long on the acs 5.2,one the vpn client user connect to asa 5510
 
Description
Selected Shell Profile is DenyAccess
Resolution Steps
Check whether the Device Administration Authorization Policy rules are correct

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Cisco VPN :: ASA 5510 Implicit Deny Access Rule Blocking Site-to-Site VPN?

Apr 22, 2012

I've setup a site to site vpn on an ASA 5510 using ASDM (as I have many times before) and the tunnel appears to be up but I am not able to pass traffic.  When I run the packet tracer from my inside network to the remote destination network, it shows that it is blocked by the implicit deny ip any any rule on my inside incoming access list.

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Cisco :: FWSM-6-106028 - Deny TCP (Connection Marked For Deletion)

Sep 30, 2011

we use FWSM , users getting connection refused while they try to connect to destination server. User subnet allowed in firewall to access the server with no port restrictions. when i see in firewall logs, i see belwo error message for source usersubnet and destination server %FWSM-6-106028: Deny TCP (Connection marked for Deletion)

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Cisco Firewall :: ASA-4-106023 / Disable Logging Of Implicit Deny?

May 13, 2013

My syslog is full of %ASA-4-106023: Deny tcp src outside:---- by access-group "inbound-acl" messages.  I did not configure an explict deny for the access list to log these denies.how I can disable logging of denied connections?

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Cisco Firewall :: ASA Software 8.3 And 8.4 And Implicit Deny Rule In ACLs?

Aug 23, 2011

I have found this in documentation (the same statement for version 8.3 and 8.4):
 
" Access Control Implicit Deny #All access lists (except Extended access lists) have an implicit deny  statement at the end, so unless you explicitly permit traffic to pass,  it will be denied. For example, if you want to allow all users to access  a network through the ASA except for one or more particular addresses,  then you need to deny those particular addresses and then permit all  others. " 

Does it mean that now all ACLs shoud have created manualy deny ip any any rule at the end ? I have migrated one ASA to version 8.3 (no host connected and I can't test it) but after migration I don't see this rule at the end of all ACLs. Does it mean that all traffic will go throu ACLs on all interfaces ? I didn't find any information about this change in documents describing new software features [URL]

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Cisco Firewall :: ASA 6.1 Deny IP Spoof From (global) To (Static NAT) On Outside Interface

Jun 2, 2013

I'm receiving an error when trying to access a web server behind from one subinterface to another subinterface on an ASA access the public IP.  I'm getting the following:
 
Global Static NAT Deny IP spoof from (61.X.X.X) to 201.X.X.X on interface Outside     
 
Traffic dies at the firewall stating that the traffic is spoofed from the Global address (61.) to the static (201.) address.  Both bound to the outside interface. When I create a static NAT on the firewall there is no problem; however when I'm patting against the firewall to the public IP I get the denies. 

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Cisco Firewall :: ASA 5520 / Deny IP Spoof On Interface Inside

Jun 17, 2012

I'm trying to attach tacacs server (ACS Version 5.2) in server group on ASA 5520 (Version 8.4). When I test connection in ASDM (Version 6.4) between ASA and ACS it fails. The log message on ASA is:
 
%ASA-2-106016: Deny IP spoof from (10.8.27.126) to 10.8.48.10 on interface inside.
 
Packet-tracer from ASA is:
 
InternetASA# packet-tracer input inside tcp 10.8.27.126 4444 10.8.48.10 49
 Phase: 1
Type: CAPTURE
Subtype:
Result: ALLOW
Config:
Additional Information:
MAC Access list

[code]....
 
What access-list or implicit rule may be the reason of denying these packets?

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Cisco Firewall :: Pix 506e Passing Traffic Even With A Deny Ip Any Any Rule

Sep 20, 2012

So I was doing some testing with my BB Playbook where I wanted to see what outside connections it tried to make during startup and whatnot. I have a pix 506e running 6.3(5). I created an simple 'deny ip any any' access list on the inside interface so that the Playbook doesn't actually make any connections, but I set up a 'capture' on the inside interface accepting 'ip any any' to see what kind of traffic I could see heading outbound from the Playbook. Well, it started off showing attempts to query DNS (and failed, naturally), but then after a couple of minutes, it tried to connect to a couple of IPs over port 443 and actually got a response!!! For the life of me, I can't figure out how this can happen. NO traffic should be allowed outbound due to my explicit 'deny' rule, but for some reason some traffic on port 443 made it past the firewall and got a response back. There are no other rules in the access list except the 'deny' rule. My PIX configuration is quite simple and I cannot see anything that would allow the Playbook traffic to circumvent the access list.

I've come to think that either RIM has found away around Cisco access-lists, or there is a bug in the Pix OS. I know it's an old appliance/OS, but still. I wouldn't think it could be THAT easy to bypass the firewall.

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Cisco Firewall :: No Connection To Outside From ASA 5510

Dec 20, 2011

I have just put an ASA5510 in place and have the following setup:
 
Interface Ethernet0/0
nameif outside
security-level 0
ip address dhcp setroute

[Code]....

I have connected my stations to an ESW540 inside of the Int Eth0/1 and am able to get ip addresses to the stations as well as DNS addresses.  I cannot however connect to the outside connection in any way.  From a computer connected to the ESW540 with a DHCP assigned IP address, I can ping the computer's IP, the ESW540's IP, and even 192.168.15.1.  But I cannot ping the ip address from the Int Eth0/0, nor anything beyond 192.168.15.1. 
 
From inside of the console of the ASA, I can ping all addresses of all ports as well as devices outside of the building and inside of ESW540. 

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Cisco Firewall :: 5510 ASA Connection Timeout For DNS

Jan 31, 2012

I recently had a firewall that wasn't passing traffic (ASA 5510 running software version 9.1).It turned out it had 130000 active connections.  Doing a "clear conn port 53" dropped the active connection count back to 38k, and the firewall started passing traffic again.

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Cisco Firewall :: 5510 - ASA 8.2.5 To Make VPN Connection From LAN To Outside?

Sep 19, 2011

i have a 5510 with SDM 8.2.5 from clients connected to LAN i cant open a VPN connection! (using windows client L2TP or PPTP) there is not rules tho block this ports, why i cant connect?
 
my configuration:
 
FIREWALLP01# show running-config
: Saved
:
ASA Version 8.2(5)
!
hostname FIREWALLP01
domain-name MAIOR.local
enable password 28kg/dOQX80WtMHA encrypted
passwd 2KFQnbNIdI.2KYOU encrypted

[code]....

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Cisco Firewall :: Use Multiple ISP Connection To 5510?

Feb 7, 2013

i've two cisco asa5510 with 4 FastEthernet interfaces each.They are connected as below:

[code]...

to three different ISP each of them! The 4rth interface of each of them, is connected to internal LAN network. Both Firewalls, offers VPN Services to ISP connections on Fa0/0
 
How can i achieve high availability for this scneario?is this possible to implement some HighAvailability and to offer the actual services to each of them, in case that the other firewall fail?What about using subintefaces? can i connect bothe ISP and Customers links on one or each of them, in case that firewall01 fails, all the services to be online on firewall02?

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Cisco Firewall :: ASA 5510 And License With AIP-SSM Connection

Oct 29, 2012

I have this box. I have few questions about it.
 
1)     Will I be able to update firmware (from 8.2 to 8.3 or higher for example) without smarnet for ASA 5510? And what can not I do without smartnet?
2)     I have only AIP-SSM-10 module to this asa 5510. is there a smartnet for it, too? And when I buy only module is there build in a 1 year subscription for  IPS signatures?
3)     If I have Cisco ASA 5510 base license, will my IPS on AIP-SSM-10 work?
4)     Also I'm planning in a year buy one more 5510 with same module and put ther in failover. Will I really need Security Plus license for failover (Active/Standby)? For Active/Active I know that I need one, yes?

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Cisco Firewall :: ASA 5510 Loses Connection With Outside Internet?

Oct 31, 2012

I had an experience this week of installing a 5510 ASA with 8.4.3, also tried 8.4.4(1) with the strange effect that I randomly was losing contact with the internet. The interface stayed up/up. no errors or what so ever on the interface. Reseat of the DSL wire no result. Reseat of the outside interface cable made it work again. And after some time lost connectivity again. It did not recover by itself so had to let someone do a reseat again and again and.... The outside was using DHCP client. A lease was given and an IP also. Nothing strange to find. Talked to the provider which could see the DSL and the DHCP lease. Finally I downgraded the firmware to 8.4.2 and the problem was solved.
 
output
interface Ethernet0/0
nameif outside

[Code].....

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Cisco Firewall :: 5510 Http Connection On LAN Interface

May 26, 2011

I am replacing an old Fw with a New ASA 5510 and I have a problem with a TCP Connection on My LAN InterfaceI joined a picture of what I want to do. [code] From the PC,I can Ping the Video Camera But I can't connect to it with HTTP.I don't understand, Packet Tracert allow the Http packet too. [code]

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Cisco Firewall :: 5510 Connection Specific TCP Timeouts

Aug 28, 2012

I got a Problem on a customer which is using a Failover ASA 5510 pair with SSM-CSC-10-K9 modules.The clients have to connect to a webserver where they are doing some calculations.If they prepare everything and want to calculate everything what takes a couple of time the session is after about 3 minutes timedout.My first idea was to set session specific timeouts which are a bit longer then the normal but this setting did not work. I created a policy which did not work for me. How to set connection specific timeout's? [code]

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Cisco Firewall :: ASA 5510 / HTTP Connection Inside Lan

Jun 8, 2011

I am configuring a new ASA 5510 to replace a SonicWall and I have a problem with an HTTP Connection inside my LAN.PC from the LAN ( using ASA LAN interface as gateway) can't Connect to a Camera video Web Server (192.168.4.20) on Port 80 whereas I can Ping it.
 
ADSM logs show :

106015# Deny TCP (no connection) from ip1 to ip2 Flags RST on Interface LAN.The adaptive security appliance discarded a TCP Packet that has no Associated connection in the adaptive security appliance Connection table.
 
- I Enabled command "same-security-traffic permit intra-interface"

- HTTP inspection is disabled.
 
I used Capture feature on the Ingress Interface, I joined the Logs and a part of my ASA Running Config.

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Cisco Firewall :: Slow Internet Connection Behind ASA 5510 IOS 8.2?

Jan 28, 2012

we have installed an asa 5510 with 3 interfaces : dmz (web server 172.20.0.59;application server 172.20.0.58; server mail 172.20.0.157), inside (lan) and outside (connected to a router for internet connexion). the problem is that the connexion internet is slow in the inside (lan). our dns is in the ouside with ip address x.x.x.60 ( the dns have translated addresse to inside and dmz 172.20.0.60). the router connected to our IPS have x.x.x.33 (our default gateway for internet). there is a simple switch between firewall and router. the inside interface of the asa is connected to catalyst cisco 6509 (the interface gigabit of the 6509 is configured to auto speed and duplex).  the asa have base lisence.here is the configuration of the asa and the output of commandes show interfaces (inside, outside), show asp drop , show perform.

firewall# show run
ASA Version 8.2(1)
!
hostname firewall
domain-name xxx.xx
enable password dgft12ghkHKM123Z encrypted
passwd dgft12ghkHKM123Z encrypted
names

[code]...

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Cisco Firewall :: ASA-5510 / ASA-5505 Loses Connection To Gateway

Jun 23, 2011

I have an ASA-5510 in a location that loses connectivity to the wan gateway after anywhere from five to fifteen minutes.  At first I thought that the unit might be defective, but I replaced it with an ASA-5505 with similar results.  A reload of the ASA-5510 will restore connectivity for the next quarter hour.
 
Here's the version information on the 5510:
 
Cisco Adaptive Security Appliance Software Version 8.2(1)
Device Manager Version 6.2(1)
Compiled on Tue 05-May-09 22:45 by builders

[Code].....

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Cisco Firewall :: 5510 - Http Connection With Video Flow

May 4, 2011

I am using ASA 5510 and I have a specific problem with Http Connection to receive a video Flow ( RSTP protocol ) in the LAN. Some Pc users (192.168.1.133,in the log)  with ASA Lan Interface as gateway can ping the Camera but don't receveive the video flow.Some Pc users (192.168.1.116,in the log) using another gateway can ping and receive the video flow. I used Whireshark  to capture traffic between camera and Pc using the 2 gateway. I joined Logs with this message.It seems to be a problem of TCP segments on the ASA, I try to changed some TCP options but it's still the same:- Disable Force Maximum Segment Size- Enable Force TCP Connection to Linger in TIME_WAIT State for at Least 15 Second.

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Cisco Firewall :: ASA 5510 - No Internet Connection On Inside Interface

Jan 3, 2012

so i have a ASA 5510. The ASA is Connect with the Internet through PPOE DSL MODEM
 
The outside Interface get an IP. The Inside Interface get through DHCP from the ASA the Internet DNS SERVER (T-Online) But the HOST do not connect to the Internet because the DNS Server is timed out
 
Code...

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Cisco Firewall :: ASA 5510 - Connection Refused By Remote Host

Apr 26, 2011

I am trying to telnet to my asa 5510 from the core swith,however i received the below msg,how enable it?
 
 172.30.1.100 is the inside interface of the asa
 CITYCORE#telnet 172.30.1.100Trying 172.30.1.100 ... % Connection refused by remote host
CITYCORE#

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Cisco Firewall :: 5510 - After Disable Of Allow Rule Connection Is Still Active

Oct 25, 2011

I am managing a firewall setup with some ASA 5510's.One of the rules I have in the ACL list is to allow or deny (By disabling the rule) access to certain subnets.
 
I have a 3rd party vendor that from time to time need access to specific servers in the infrastructure, but I want to keep a certain level of control when they can access them and especially when they can not.
 
I know it works fine, I have done several tests to verify when they can connect and when they can not. But, now comes the tricky part, if they are already connected (Remote desktop) to the system, and I disable the rule, they are STILL!!! connected. It seems the firewall does not terminate the active session / cconnection when I disable the rule allowing them access..

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Cisco Firewall :: 5510 - Filter Internet IP Address Allow To Initiate VPN Connection

Apr 10, 2011

Using Cisco ASA5510 Security Plus (Post May 2010) with 8.2(1)
 
I was trying to limit the number of internet IP Address that can initiate Remote Access VPN connection to the firewall. I have plan to only allow internet IP Address from few ISPs for control.
 
However, blocking AHP, ESP, ISAKMP, NON500-ISAKMP, and IPSec Over TCP Port Assigned in the firewall outside interface doesn't work. But it works by putting the ACL in the router before the firewall. It seems that the  firewall have a "hidden" process VPN first before user entered ACL (or explicit rule), similar to Checkpoint FW's implied rule. How to get around it?

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Cisco Firewall :: PIX 515E / ASA 5510 Heartbeat Failover (Direct Connection)

Apr 2, 2011

Currently, my customer has 2 units of Cisco PIX 515E running on Active/Standby mode. As for the heartbeat link, there are 2 dedicated switches placed in between both the Cisco PIX 515E i.e. FW1 --> SW1 --> SW2 --> FW2.

My customer will be changing both the Cisco PIX 515E to Cisco ASA 5510. Now, they are asking me, since they will be using Cisco ASA 5510 eventually, can the heartbeat link be a direct UTP cross cable or must the 2 switches in between still exist?

I remember I have tested this before, few years back, in the event I were to pull out the UTP cross cable that's connecting both the Cisco ASA 5510 Firewalls directly (without any switches in between), the Active/Standby mode still works fine. It doesn't go bad whereby both the Cisco ASA 5510 suddenly becomes Active/Active, and causes network issue.

Are switches required for the heartbeat link in a Cisco ASA environment or can a direct UTP cross cable connection be adequate.

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Cisco Firewall :: ASA 5510 - Website Connection Auto Timeout After 5 Minutes

Oct 15, 2011

Our client tried to a download a real time generated file from a website, the generation process around 5 mins, after 5 mins, the file will be started to download
 
When my client direct connect to internet, the file can be download successfully, but when pass through the ASA 5510 and using the internal IP address, a message something like "Are you sure want to logout from this web page?" appears in Safari after 5 mins, i think the time of the error message appear when a "you can start to download" message send from the server to client, the page session timeout so that make the user cannot download the file from internet as the session is not vaild.
 
I couldn't find any timeout setting in "show runn", is it possible the setting in ASDM? how can I find it and configure it?

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Cisco Firewall :: ASA 5505 Site To Site RTP Traffic Is Hitting Deny All Rule?

Aug 13, 2012

Got an ASA5505 connected to another endpoint running IPsec and being NAT'd at each end to a 10.0.0.0/24 network. I can pass other types of traffic through the ASA 5505 but not RTP traffic. The moment it is NAT'd and hits the firewall rules it gets denied by the default deny at the bottom of the list.

Currently the rules are as follows
 
 Incoming External
allow ip any any
allow tcp any any
allow udp any any
default deny

 [code].....
 
It wont allow us to setup a voip call...however when the same call manager sets up a voip call NOT using this ipsec tunnel it works just fine.

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Cisco Firewall :: ASA 5510 - Show Local-host All Detail Connection / Timeout

Nov 28, 2012

Version: Cisco ASA 5510 8.4(4)1

I've installed cisco asa 5510.

When I "show local-host all detail connection "

Normal situation:

105 myfailover:10.255.255.2/0 NP Identity Ifc:10.255.255.1/0,
idle 0s, uptime 1D14h, timeout 2m0s, bytes 18196822

But I got this output ( timeout - )

[URL]

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Cisco Firewall :: ASA 5510 / Can LDAP-authenticated Remote User Be Assigned A Connection

Jun 30, 2011

ASA 5510 ASA 8.0 ASDM 6.1 I want some remote users to have split-tunnel connection, others not.  I used Cisco Document ID 100936 "Allow Split Tunneling for AnyConnect VPN Client on the ASA Configuration...".  I created a new Group Policy with split-tunnel enabled.  I created a new Connection Profile and assigned to it the new Group Policy.  When I authenticate at the AnyConnect client I get a dropdown of the 2 connecton profiles, to choose the one I want.  Each of them works, enabling or disabling split-tunnel.  But I want to assign a connection profile to the particular user, not give the user a choice.  The problem is I'm using LDAP authentication.  The Local Users I set up before LDAP are obsolete, assigning them a Group Policy does nothing.  I really don't want to give up LDAP and force people back to another local password.  But the LDAP authentication to Active Directory just says yes or no, it won't assign a connection profile.  At the AnyConnect Connection Profiles page I have set a switch "Allow user to select connection profile, identified by its alias, on the login page.  Otherwise, DefaultWebVPNGroup will be the connection profile".  If I clear that switch every user will be assigned the same default profile, which does not work.

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Cisco :: Access Deny In L3 Switch?

Jun 8, 2012

i have Cisco L3 switch configured with diff vlan and assign diff subnet for all vlan . if i connect pc to vlan 2 i am able to ping host related to other vlan

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